Turn on the first for one min and then turn it off. % Z/ ^/ a4 ?/ d* Q, X6 x. t: t6 ETurn on the 2nd for five min and then turn it off.% A6 r/ e4 g2 W0 k
Turn on the 3rd and leave it on. # v8 p0 u5 r4 z6 S4 j- L, [2 hAnd then go upstairs right away. 3 x/ d4 v9 r& t; u" I [ I; P5 y* C. d% i! l- {
Find the answer by using your fingers and eyes( b$ @. m% @" k2 X( Y! j
这只是一个智力问题,不象是电工问题。
原帖由 老警察 于 2009-1-16 07:12 发表 ( `6 T% ]$ `4 E: a2 O6 y$ i1 q
Turn on the first for one min and then turn it off.+ ?" v8 B, @" K
Turn on the 2nd for five min and then turn it off. * g0 O5 l* T8 U5 D1 ETurn on the 3rd and leave it on.' y. s( J: A4 D+ O8 v
And then go upstairs right away. # t! T1 x% T% K1 x2 U5 n0 W % S r0 V% x* x }7 QFind the answer by using ...